220371

220371 is a positive integer. It is odd and squarefree, since it factors into four distinct primes. Its prime factorization is 3 × 17 × 29 × 149, making it a product of four different primes.

Because all prime factors are distinct, 220371 has 2^4 = 16 positive divisors. The divisors, listed in ascending order, are: 1, 3, 17, 29, 51, 87, 149, 447, 493, 1479, 2533, 4321, 7599, 12963, 73457, 220371. The sum of all divisors is (1 + 3) × (1 + 17) × (1 + 29) × (1 + 149) = 4 × 18 × 30 × 150 = 324000, so the sum of proper divisors is 324000 − 220371 = 103629.

The number is divisible by 3, as indicated by its digit sum (2 + 2 + 0 + 3 + 7 + 1 = 15), and is not divisible by 9. As a composite squarefree integer, 220371 serves as an example in number theory of a multi-prime product with a relatively small divisor structure, illustrating how prime factorization determines its divisors and related arithmetic properties.